Xcas

Xcas is a broad computer algebra workspace for symbolic mathematics, graphing, geometry, spreadsheets, statistics, and programming. It is best for students, educators, and technically minded users who want one adaptable environment for varied mathematical work. Its free license and wide platform reach are compelling, while the browser edition and uneven documentation make it less suitable when speed or a polished learning path matters most.

Overview

Founded in 2000, Xcas provides an interface to the Giac computer algebra system. It goes well beyond a conventional graphing calculator: you can move from solving equations and studying calculus to building dynamic geometric constructions, analysing data, and writing programs in the same application. Compatibility modes for Maple, MuPAD, and TI calculator CAS software are useful when established syntax or working habits need to be carried across.

This breadth is valuable for coursework, teaching, experimentation, and high-school testing, but it also creates a steeper orientation task than a single-purpose solver. The English overview describes the documentation as incomplete, although tutorials, reference guides, a forum, and other documentation provide practical support.

Key features

Symbolic mathematics

Xcas handles arbitrary-precision arithmetic, polynomial operations, expression simplification, equation solving, calculus, and linear algebra. That combination suits users who need to transform and investigate mathematical objects, not merely obtain a numerical answer. It is a strong fit for algebra and calculus study where exact forms and deeper manipulation matter.

Geometry and graphs

Programmable dynamic 2-D geometry, 3-D geometry, and graphing let users construct visual, changeable models rather than static plots. This is useful for lessons and exploratory work, especially when geometric relationships or functions need to be adjusted interactively. The maker warns that 3-D display problems can occur on some Windows setups, so Windows users with geometry-heavy work should treat that as a practical risk.

Spreadsheet and statistics

The spreadsheet supports relative and absolute references and formal objects in cells. Its one- and two-dimensional statistics include regressions, giving learners and analysts a way to combine tabular calculations with mathematical objects and statistical exploration. This integrated approach is more capable than a calculator-only workflow, though it also adds another part of the interface to learn.

Programming and integrations

Functions, variables, tests, loops, a program editor, and an interactive debugger support increasingly substantial calculations. Syntax modes include C-like, Maple, MuPAD, and TI89, which can reduce friction for users arriving from those environments. The Giac calculation library can be embedded in C++, Python, Java, and JavaScript programs, and Xcas describes interfaces with LaTeX and TeXmacs. That makes it a credible component for technical workflows, not just a standalone desktop tool.

Pricing

PlanPriceWhat it includesXcasfreeFree computer algebra system under the GPL3 license. Commercial software inclusion requires contacting the makers about a dual license.There is no paid consumer tier to weigh against the free edition: the complete Xcas offering is free for users under GPL3 terms. That makes it an appealing choice for students, teachers, and independent learners with no software budget. Organizations embedding it in commercial products need to address the dual-license requirement with the makers, so “free” does not automatically mean unrestricted commercial redistribution.

Platforms

Xcas supports Android, iOS, Linux, macOS, the web, and Windows. Desktop builds are the better choice when performance and completeness matter. The browser version runs locally without installation or an internet connection, which is convenient on shared or locked-down computers, but it is slower and less complete than compiled desktop versions. Android users can open it in Firefox or Chrome; iOS use is also browser-based, with the maker noting that its iOS instructions had not been tested by the author. The Mac OS 14 package is unsigned, so installation requires allowing a non-signed package. Some Ubuntu Unity versions have produced crashes or unrecognized keystrokes.

Who it's for

Choose Xcas if you want a single free system spanning exact algebra, calculus, graphing, dynamic geometry, statistics, spreadsheets, and programmable computation. It is particularly well suited to mathematically ambitious students, educators, and users replacing or supplementing a high-end graphing calculator. Developers can also use Giac from several programming languages.

Look elsewhere if your priority is instant, narrowly focused problem solving, a faster browser experience, or highly polished English guidance. Xcas rewards users willing to learn its modes and tools; casual users may find that breadth unnecessary.

Pros and cons

Pros

Broad mathematical scope: symbolic algebra, calculus, linear algebra, geometry, graphs, spreadsheets, statistics, and programming live in one environment.

Free and widely deployable: GPL3 software with desktop, mobile-browser, and web support across the major operating systems.

Useful compatibility: Maple, MuPAD, and TI calculator modes can ease migration, while Giac integrations support C++, Python, Java, and JavaScript projects.

Offline browser operation: the web edition can run locally without installation or an internet connection.

Cons

Browser compromises: the browser edition is slower and less complete than compiled versions.

Platform caveats: some Windows systems have 3-D display issues, Ubuntu Unity versions may crash or miss keystrokes, and the macOS 14 package is unsigned.

Documentation gap: the English documentation is described as incomplete, increasing the effort needed to master a wide feature set.

Commercial licensing complexity: embedding Xcas in commercial software requires discussion of a dual license.

Alternatives

GeoGebra is the better fit if you want a freemium tool spanning web, desktop, and mobile platforms with an EUPL 1.2-licensed source code base, subject to its stated non-commercial limits for installers and web services.

MathPad suits readers who prefer an AI-oriented freemium workflow, with a free allowance of 10 daily credits and three AI Tutor trial messages per day.

Mathos AI is aimed at guided, multimodal help, offering a free tier with limited MathosPro, six video minutes per day, limited image input, flashcards, quizzes, and auto-drawn graphs.

Mathos AI (MathGPTPro) is another freemium AI alternative with limited video generation and image input alongside flashcards, quizzes, and auto-drawn graphs on its free plan.

CameraMath is the more appropriate choice for photo, screenshot, handwritten, text, or calculator input with step-by-step solutions.

Mathway is a freemium solver and calculator service with free access and optional subscription features, suited to users who want guided solutions rather than a programmable CAS workspace.

PARI/GP is a free GPL v2-or-later alternative for users focused on computational number theory and a more specialized system.

For a broader shortlist, see Math Solver Apps.

Verdict

Choose Xcas when you need a free, multiplatform mathematical environment that can carry exact symbolic work through graphs, geometry, statistics, and code. Its main reason to look elsewhere is the combination of a slower, less complete browser edition, documented platform quirks, and an incomplete English documentation set.